you probably don't need the springs. They are heavy.
The pear shape supports your body weight on your sit bones. if you get too narrow, guess what you are being supported by? the tender things in there.
The "S" size is shorter, for some reason someone thought women would like/want a shorter saddle. I have regular length saddles, and I am not large in any dimension.
I hope that helps.


ps, city riding IMHO is pretty bumpy sometimes. Potholes and cracks can be pretty bad. Unless you live somewhere where roads actually get repaired in a timely way